Pile wire



March 25, 1952 F. P. GROAT ETAL 2,590,609

PILE WIRE Filed Dec. 28, 1949 INVENTOR. J' Wanc zls R Grioab FTTOKNE )1knob "type will not operate satisfactorily Patented Mar. 25, 1952 PATENTOFFICE PYIIE means -1 armband-Harry W; Hi lLaBloomsburg, Pagassig'nors.tonrrhe-cMagee: carpet Company; :lslo'emsburg naga porpo'ration ofPennsylvania Appiieanonfiiecemter 28, 1949,, Ser'ialNo.:-'1'3'5,-4'4'5invention relatesto improvements p le form loop's 'and upon withdrawalof the wires the loops are raised by the knob to a height correspondingto the height of the knob. In practice, the. variation in the height ofthe *shank'of knob wires is limited which necessarilyslimitsthevar-iation in the height of the knob,so thatlthe height of the loops formedby withdrawal of the wires is rela tively high. If the height of theshank is anew-a certain limit the wirewill turn causing thkhobtbtip-over to the side so as to' interfere Withthe "withdrawal'of thewire; Wires :t

the knob 'remainsere'ct when the wire is withdrawn and consequently thepresent wires must have a relatively high shank and knob.

It is an object of the present invention to provide a wire having arelatively low shank and knob with means for maintaining the wire in anerect position while being withdrawn from the woven fabric to producepile loops of relatively low height.

A further object of the invention resides in providing a pile wirehaving a knob provided with a widened base or shoe which serves to holdthe knob in an erect position when the wire is withdrawn from the wovenfabric.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawing forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame,

Fig. 1 is a side elevational view of the improved wire,

Fig. 2 is a top plan view of the same,

Fig. 3 is a sectional taken on the line 3-3 of Fig. 1, and,

Fig. 4 is a section taken on line 4-4 of Fig. 1.

Referring to the drawing wherein for the purpose of illustration apreferred embodiment of the invention is shown the numeral 5 denotesgenerally the improved wire. It includes a shank 6 of substantiallyrectangular shape in cross section having upper and lower rounded edges1 and 8 Claims; (01.139-44) the lower edge 8 of the shank.

knob-or. raised portion throughout their length z '8.v The shank is thatportion of the wire which is inserted i n'the fabric being woven andth'e length of the shank will depend on the widthof the fabric to bewoven. The front endof the shank which is that end opposite the endattached to the head is provided witha raised per tien or k n'ob -9 andwhen the shank is fully ins'erted 'the r aise'd lp'or tion extendsbeyond the inner selvage of the fabric. 7 The forward edge "I 0 of theknob rise's' gradually from the shank to the erestxor theknob. The rearend of the knob terminates in a point H from which extends'a downwardlycurved edge l2 which merges with The sides of the are fiared o'utwardlyat the bottom to provide lateral flanges or-ex'tended portion '13extending from opposite sides of the shank which serve as a foot or shoeto hold the knob in a vertical or erect position at all times. The footform'ed by the extended portions has a width greater than the width orheight of the shank.

knob'wire of the type described is particularly useful when used incombination with plain wires with or without cutting wires. A loop pilefabric having loops of different heights in some of the transverse rowsmay be woven by using the improved knob wire in alternation with plainwires and if a loop and tuft pile fabric is desired cutting wires may beinserted in the fabric between the knob and plain wires. Assuming a.-fabric of two or more frames of pile warp is'being woven and the warpsare selectively raised over the wires inserted in the fabric in theusual manner. Upon withdrawal of the plain wires the loops formedthereon will be of a height corresponding to the height of the wire.When the succeeding knob wire is withdrawn the loops formed thereon willbe raised by the knob to a height corresponding to the height of theknob which pulls the warps to reduce the height of those loops in thepreceding row formed from the same warps. Those loops in the precedingrow not formed of the same pile warps will not be reduced in height andas the row of loops formed by withdrawal of the knob wire are notaffected by withdrawal of the next succeeding plain wire they willremain a uniform height corresponding to the height of the knob. Byproviding the knob wire with a relatively low shank and knob it ispossible to produce a row of loops having a height no greater than theheight of the lowest loops in the rows of loops of different heights. Inpractice a plain wire having a height of .370" has been used incombination with a knob wire having a shank of .082" and a knob of .144giving an all over height of .226. The loops woven over the plain wireof the same pile warps as the loops woven over the shank of the knobwire were reduced by withdrawal of the knob wire a distance of .144", sothat the row of loops formed by the knob wire were the same height asthe lowest loops in the rows of loops of different height. Heretofore,knob wires of the dimensions mentioned were not feasible as the wireswill turn causing the knob to tip over to the side and interfere withwithdrawal of the wire. By providing the knob on the end of the shankwith a shoe or foot we have overcome this difiiculty which permits knobwires of such dimensions to be used and thus produce loop pile fabricsof new and novel textured effects.

It is to be understood that the form of our invention herein shown anddescribed is a preferred example of the same and that changes in theshape, size and arrangement of the parts may be made without departingfrom the spirit of the invention or scope of the subjoined claims.

Having thus described our invention, we claim:

1. A pile wire for wire looms comprising a shank having a raised portionat one end and lateral flanges on said shank for maintaimng the raisedportion in an erect position when inserting or withdrawing the wire.

2. A pile wire for wire looms comprising a shank having a high portionat one end, the lower edge of the high portion having lateral flangesfor maintaining the high portion in an upright position.

3. A pile wire for wire looms comprising a relatively low shank having araised portion at one end, the sides of the raised portion being curvedoutwardly at the base to provide a foot wider than said shank.

4. A pile wire for wire looms comprising a relatively low shank, a highportion at one end of said shank having its top edge inclined downwardlyinto merging relation with the top edge of said shank, the sides of saidhigh portion being flared outwardly at the bottom to provide a footwider than said shank.

5. A pile wire for wire looms comprising a relatively low shank, a highportion at one end of said shank having its top edge inclined downwardlyinto merging relation with the top edge of said shank, the sides of saidhigh portion being flared outwardly at the bottom to provide a footwider than said shank, said foot being curved upwardly at its outer end.

6. A pile wire for wire looms comprising a shank of relatively lowheight having a raised portion at its front end, said shank havingextended portions from opposite sides thereof to provide a foot having awidth greater than the height or width of the shank.

7. A pile wire for wire looms comprising a shank of relatively lowheight having a raised portion at its front end, said raised portionbeing extended from opposite sides to provide a foot for supporting theraised portion in an upright position when inserting and withdrawing thewire.

8. A pile wire for wire looms comprising a shank of relatively lowheight having a raised portion at its front end, a portion of the loweredge of said shank adjacent the front end of the shank being wider thanthe height or width of the shank.

FRANCIS P. GROAT. HARRY W. HILL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 763,181 Hardwick June 21, 19041,130,617 McCollum Mar. 2, 1915 1,130,618 McCollum Mar. 2, 19151,882,739 Behrman Oct. 18, 1932 2,164,090 Shuttleworth June 27, 1939

